North America Native Plant

Axilflower

Botanical name: Mecardonia acuminata var. acuminata

USDA symbol: MEACA

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Bacopa acuminata (Walter) B.L. Rob. (BAAC)  âš˜  Pagesia acuminata (Walter) Pennell (PAAC10)   

Axilflower: A Charming Native Groundcover for Wet Gardens Looking for a native plant that thrives in those perpetually soggy spots in your garden? Meet the axilflower (Mecardonia acuminata var. acuminata), a delightful little perennial that actually loves having wet feet! This unassuming native herb might not win any height contests, ...

Axilflower: A Charming Native Groundcover for Wet Gardens

Looking for a native plant that thrives in those perpetually soggy spots in your garden? Meet the axilflower (Mecardonia acuminata var. acuminata), a delightful little perennial that actually loves having wet feet! This unassuming native herb might not win any height contests, but it makes up for it with charm and ecological value.

What Makes Axilflower Special

Axilflower is a true native treasure, naturally occurring across 19 states from the Southeast to the South-Central United States. You’ll find it growing wild in Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Illinois, Kansas, Kentucky, Louisiana, Maryland, Mississippi, Missouri, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, and Virginia. This widespread distribution tells us something important: this little plant is adaptable and resilient!

As a perennial forb, axilflower returns year after year without the woody stems of shrubs or trees. Instead, it forms a low, mat-like groundcover that spreads naturally in suitable conditions. You might also see it listed under its former scientific names, Bacopa acuminata or Pagesia acuminata, in older gardening references.

Why Your Garden (and Local Wildlife) Will Love It

While axilflower produces small, delicate flowers that may seem modest compared to showier garden stars, these blooms are perfectly sized for smaller pollinators like native bees and beneficial insects. The plant’s low-growing, spreading habit makes it an excellent choice for:

  • Rain gardens and bioswales
  • Pond and water feature margins
  • Native plant gardens
  • Wetland restoration projects
  • Naturalized landscape areas

Growing Axilflower Successfully

The secret to success with axilflower is simple: give it the moisture it craves! This plant thrives in USDA hardiness zones 6-9, making it suitable for much of the temperate United States.

Ideal Growing Conditions

  • Moisture: Consistently moist to wet soil – this is non-negotiable
  • Sunlight: Full sun to partial shade
  • Soil: Adapts to various soil types as long as moisture is consistent
  • Drainage: Unlike many plants, axilflower doesn’t mind poor drainage

Planting and Care Tips

Once established, axilflower is refreshingly low-maintenance. Here’s how to get it started:

  • Plant in spring after the last frost
  • Choose the wettest, soggiest spot in your garden
  • Water regularly until established, then let nature (and your sprinkler system) take over
  • No need for fertilization – native plants prefer lean conditions
  • Allow it to spread naturally to form colonies

Is Axilflower Right for Your Garden?

Axilflower is perfect for gardeners who:

  • Have consistently wet or boggy areas that challenge other plants
  • Want to support native wildlife with indigenous plants
  • Prefer low-maintenance groundcovers
  • Are creating rain gardens or wetland gardens
  • Live within its natural range and want to garden with local natives

However, it might not be the best choice if you have only dry, well-drained garden beds or are looking for a tall, showy specimen plant.

The Bottom Line

Axilflower proves that native plants don’t have to be flashy to be valuable. This modest perennial fills an important niche in wet-soil gardens while supporting local ecosystems. If you’ve been struggling with a persistently wet spot in your landscape, why not work with nature instead of against it? Axilflower might just be the perfect solution you’ve been looking for!

Axilflower

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Mecardonia Ruiz & Pav. - mecardonia

Species

Mecardonia acuminata (Walter) Small - axilflower

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA